Mining machine



Dec. 23,- 1930. c. G. BOUDETTE MINING MACHINE 5 Sheets$heet 1 Filed Oct. 31, 1927 may.

Dec. 23, 1930. c. G. BOUDETTE MINING maxim:

' Filed Got. 31. 1927 5 Sheets-Sheet 2 Dec. 23, 1930. C. (5. BOUDETTE MINING MACHINE 31, 1927 5 Sheets-Sheet 3 Filed Oct.

w? RQ Dec. 23, 1930- c. G. BOUDETTE MINING MACHINE Filed Oct. 31, 1927 5 Sheets-Sheet 4 P 1111111111 i g MINING MACHINE Filed 001;. 31, 1927 c. G. BOUDETTE Dec. 23, 1930.

Patented Dec. 23; 1930 stares arEN'r TOFFEE CORNELIUS G. BGUDFiTTE. OF ,CLAREMONT, NEW HAMPSHIRE; A SSIGiQ'OR TO SULIJIVAN IEACHINTQBJY GQI'IPANY. A CGEPORATIGN F MASSACHUfaETTS MINENG- l IA CHINE Application filed. Gctober 1927. Serial No. 220,004;

This invention relates to n'iiningmachines and more particularly but not exclusively pertains to coal mining machines of thewheel mounted universal type adapted to operate from the mine trackway.

' object of this invention isto provide an.

improved coal mining machine of the wheel mounted type. Another object isto provide an improved coal mininginachine adapted to operate either as horizontal cutter or a. shear cutter. Still another object is to providea coal mining machine having improved elevating and tilting mechanism for the cutting mechanism and improved mechanism for rotating the cutter carrying headlto change the planeof operation of the cutter bar. Yet-another object is to provide an im- :.proved coal mining machine of the combined iorizontal and shear cutter type wherein the cutter bar 1 ay be expeditiously adjusted into a plurality of operative positions. A still further object is to provide an improved coal mIDIHQ'lDELClHDQ off the wheelmounted type having improved elevating and tiltin mechanism for the machine. body whereby the elevation and angle of the cutter bar may be varied to suit different cutting conditions. These and other objects and advantages of this invention; will, however,jhereinatter more 'l'ull'y appear. In the accompanying drawings there is shown for purposes ofillustration one form which the invention inayassnme in practice.

. thesedrawings e V v F 1 :s a plan v ew ota-mnnng mach ie constructed in accordance with an illustrative embodiment oi theinvention. 1

Fig. 2 is a side elevationalview of the ma.-

shown in its elevated position.

Fig. 3 view 'ot the machine shown in Final, parts being shown in section'to illustrate-details of conszruction. i I Fig. 4; is a transverse vertical sectional view taken on line 44 of Fig. 3.

Fig. 5 is a vertical detail sectional view taken on line 55 of Fig; 4. so Fig. 6 1s a detail view illustrating the'com view taken on line 99 of Fig 2.

chine shown in Fig, 1, the machine being is an'enlarged fragmentary plan trolling arrangement for the clutches and brake bands. V i Fig. is an enlarged vertical longitudinally eXtending sectiona-l view taken on line 'i"'7 of Fig. 3 and illustrating the plural speed transmission mechanism.

Fig.8 is a transverse verticalv detail sectional view taken on line 8 8 of F 1g. Fig. 9 is a transverse vertical sectional g v 7 e0 l0 is a'transverse vertical sectional view taken on line 10- 10 of Fig. 2.

Fig. 11 is a diagrammatic view illustrating the improved elevating and tilting mechanism, the mechanism being shown in a plurality of positions as indicated by dotted lines. y

In this illustrative embodiment of the invention there is shown a coal mining machine of the so-called universal t ae mounted.

on wheels and operating from the mine tracl. way. Themachinethe same general type as those described in the co-pendi plications of Morris Holmes, Ser. (SA-77, filed Feb. 2, 1925 and Ser. l lo. filed September 24, 1926 and generally. co prises a machine body 1 composed of a 1 tion housing the driving c-oi'inecti ns for V the cutting 1118Cl'l3l3lS111 a motor section 351ml a section l housing theplural speed tr missionmeans for the truck drive, as 1.

tating'thecutter carrying head and for eleprovided with semicircular bores 10, while 95 'pivotally connected to these frame members as at 11 are pivoted capmembers 12, each held in position by suitable clamping screws 13. The semi-circular bores 10 and cap members 12 receive split bearing sleevesl in which cylindrical portions 15 formed on frame sections 16 and 17 are respectively rotatably mounted, the frame sections 16 and 17 being connected as by bolts 18 (see Fig. 3} respectively to the opposite ends of the motor section 3, the frame sections 2 and 4 also being rigidly connected to the frame sections 1i; and 1?, respectively. It will be noted that the frame sections 52, 3, at, 16 and 17 when united form the. body 1 of the machine and this body is rotatably mounted within the bearings 1-; for rotation about its longitudinal axis relative to the wheel mounted frame 5 as will later be described. As illustrated, suitably connected to the transverse frame members 6 and 7 are pivoted supporting arms 19 and 20 which carry the truck wheels 21, the arms 19 and 20 and the wheels 21 constituting the supporting means for the machine.

In specifically describing the plural speed transmission mechanism housed within the frame section 1- it will herein be noted that housed within the motor section 3 is a suitable driving motor 25 herein preferably of the usual reversible electric type having a horizontal armature shaft 26 extending longitudinally of the machine. The rear end of the armature shaft 26 has suitably secured thereto a coupling member 2'? (see Fig. clutched at 28 to ashaft 29 disposen in longitudinal alinement with the armature shaft. The rear end of the shaft 29 has suitably fixed thereto a spur pinion 30 which is adapted to drive the truck wheels. the elevating and tilting mechanism, and the rotating mechanism for the cutter carrying head through transmission mechanism to be hereina ter described including transmission gearing and controlling clutches, substantially similar to those described in a copendin application of Morris P. Holmes, Ser. No. 707,031., liled cember 18, 1924, at a slow speed in one direction or at a fast speed in the reverse oirection without reversing the motor. In specifically considering the fast speed transmission it will be noted that the pinion 3. (see 7) meshes with a spur gear 31 and this gear 31 has secured thereto and rotatable therewith a spur pinion 32 which in turn meshes with a large internal gear 'llhe hub ill of the gear 33 is herein journalcd on a suitable bearing sleeve 35 on a sleeve clutcl member 36 keyed as at 537 to a longitudinall disposed horizontal main driving or transmission shaft 38 suitably journaled within the frame section liloreover, it will be noted that the member 36 carries a series of friction clutch discs 39, which discs cooperate with a corresponding series of clutch discs ll) carried by the sleeve of the internal gear 33. As shown, the sleeve on the internal gear is also provided with a plurality of radially located longitudinally extending slots 4-1 receiving radial lingers on an intci locking member l3 keyed to the hub of a spn pinion -14: freely rotatable on the shaft 3;. Projecting between these lingers a e l riction clutch operating lingers carried by a cylindrical plane aemliibr 46 disposed coar'ially with the hub of the ear 4- These lingers extend longitudinally into contact with the end disc of one s t of friction discs 39 and 10. Herein, as shown. the rear end of the shaft 38 has secured thereto by a he}; 4?, a spur pinion which meshes with a spur gear 49. The spur gear has secured thereto and rotatable therewith a spur pinion 59 which meshes with a large internal 1 keyed as at 5:2 to a longitudinally extendi horizontal transmission shaft disposed in longitudinal alinen'icnt with the sl aft 38. It will thus be noted that rotation of the armature shaft 26 may be transmitted to the pinion 30, gear 31, pinion 32 internal gear 3 friction clutch discs 39, d0. clutch member shaft 38, pinion a8, gear 49 pinion 5t) intcrrel gear 51 and the shaft 53 to rotate the latter at a predetermined high speed or fast speed whenever the clutch controlling member ll; is operated to apply the clutch. lt will here further be evidentthat this speed may be lowered at will by slipping the friction discs 39,

Referring to the slow speed transmission it will be noted that when the clutch controlling member 46 is in inoperative position and the clutch is released, power will still be transmitted through the interlocking member Bite the pinion 44L which is freely rotatable on the shaft 38. This pinion in turn meshes with a spur gear 54 disposed coaxially with the gear 31 and this gear has secured thereto and rotatable therewith a spur pinion which meshes with a spur gear 56 rotatably mounted on the shaft 38. The gear 56 has secured thereto and rotatable therewith a spur pinion 5'? which meshes with a spur gear 58 disposed coaxially with the spur gear and this gear drives a spur pinion 59 which meshes with an internal gear 60 substantially similar to the internal gear 33. The internal gear 60 also houses a friction clutch substantially similar to the clutch heretofore described in connection with the clutch discs 39 and 40 and this clutch includes friction clutch discs '31. and 62, certain of which are carried on a clutch member 63 keyed at 64 to the shaft 38. while others are carried by a sleeve formed on the internal gear 60. A clutch retaining member 65 is provided, keyed at 66 to the hub of the spur pinion 48 and. this clutch member in this instance has no interlocking function and functions only as a disc retaining member. A. cylindrical plane clutch operating member 67 surrounds the hub of the clutch member 65 and is provided with longitudinally extending fingers 68 which are adapted to engage the end disc of one set of the friction discs 61, 62. As a reand 133 also rotatably mounted on the bearing sleeves 130.

In this instance, the worm 132 meshes With a worm gear 134 rotatably mounted in ball bearings 135 carried by the housing 99 (see Fig. 11). The worm gear 134 is internally threaded at 136 and constitutes a nut threadedly connected to an axially movable screw 137 extending longitudinally of the machine. As shown in Fig. 10, the screw 137 has formed thereon at its forward end a rectangular portion 138 sli'dably mounted in a rectangular groove or slot 139 formed within the transverse frame member 7, the rear end of this screw being suitably guided within the housing 99. The bottom portion of the rectangular portion of the screw 137 has formed thereon rack teeth 140 which mesh with teeth 141 formed ona gear segment 142. The gear segment 142 is suitably fixed to the rear machine supporting arm 20. Again referring to Fig. 4 it will be observed that the worm 133 meshes with a worm gear 143 similar to the worm 134 and likewise ournaled within the housing 99. The worm gear 143 constitutes a nut member threadedly connected to an axially movable screw 144 disposed parallel with the screw 137 but at the opposite side of the machine. As shown in Fig. 9 the screw 144 has formed thereon at its forward end a rectangular portion 145 guided within a slot or groove 146 formed within the transverse frame member 6. The screw 144 has formed thereon rack teeth 147 which mesh with teeth 148 on an arcuate gear segment 149. The gear segment 149 is suitably rigidly secured to the machine supporting arm 19. As clearly shown in Figs. 9 and 10 the arms 19 and 20 are pivotally mounted within bearing sleeves 150 and 151 suitably carried by the transverse frame members 6 and 7, respectively, as clearly described in the said applications to Morris P. Holmes. Operatively associated with the friction clutches 124, 126 and 125, 127 respectively, are clutch applying members 152 and 153 with which shipper yokes 154, 155 cooperate. These shipper yokes are respectively connected through transversely extending operating rods 156 and 157 (see Fig. 6) to operating levers 158 and 159 pivotally mounted at 160 on a bracket rigidly bolted to the side of the adjacent angle member 8. It is therefore evident that the clutches 124, 126 and 125, 127 'may be selectively or simultaneously applied or released at will.

The improved truck wheel driving mechanism comprises a clutch member 161 keyed at 162 to the outer end of the shaft120. The hub of the clutch member has rotatably mounted thereon a chain sprocket 163 having clutch teeth 164 formed thereon adapted to be connected by a shiftable clutch member 165 to teeth 166 formed on the clutch member 161. As illustrated, the chain sprocket 163 is connected through an endless chain connection 167 to a chain sprocket 168 keyed as at 169 to a horizontal transversely disposed shaft 170 disposed coaxially with the pivot for the machine supporting arm 20 and extending through the bearing portions of the latter. As shown in .Fi 10 the opposite end of the shaft 170 has fixed thereto at 171 a chain sprocket 172 connected through an endless chain connection 173 to a chain sprocket 174. The chain. sprocket 174 is keyed at 175 to a horizontal shaft 176 arranged parallel with the shaft 17 O. The shaft 176 is arranged coaxially with the pivot for the machine supporting arm 19 and extends through the bearing portions of the latter as clearly shown in Fig. 9. As illustrated, the shafts 170 and 176 are each connected through a train of spur gears 177, 178, 179 to axles 180 and 181, respectively. These axles have fixed thereto the truck wheels 21. The shipper clutch member 165 is operated by a shipper yoke 182 pivotally mounted at 183 on the housing 99. This shipper yoke is connected by an actuating rod 184 and a cooperating operating lever 185 pivotally mounted on the bracket supporting the levers 158, 159. As shown in Fig. 4, the central spider member 85 is provided with a peripheral groove 187 with which a brake band 188 cooperates (see also Fig. 5). The brake band 188 is provided with a threaded operating rod 189 carrying a suitable hand wheel 190 conven iently located at the top of the housing 99. Similar hand wheels 191, 192 are provided for the brake bands 117 and 118 respectively.

It will herein be noted that the shaft 17 O has fixed thereto at 193 a brake drum 194 with which a brake band 195 cooperates, suitable operating mechanism being provided including a pull rod 196 and a cooperating operating lever 197 pivotally mounted on the side of the wheel mounted frame 5.

The cutter carrying section 2 has pivotally mounted thereon for angular movement relative thereto an elongated plane cutter bar 198 about the margin of which a cutter bit carrying cutter chain 199 is adapted to be circulated. As the mechanism for driving the cutter chain 199 and for swinging the bar about its pivot does not specifically enter into this invention, and as these connections are clearly described in the copending application Ser. No. 6,477 mentioned above, further description is herein submitted to be unnecessary.

The general mode of operation of the machine will now be briefly described. When it is desired to propel the machine about the mine along the trackway in the entry at a fast or transport speed, the operator grasps the lever 185 and shifts the clutch member 165 outwardly from the position shown in Fig. 4 thereby connecting the chain sprocket 163 to the shaft 120. The friction clutch 87,

89 is then applied connecting the bevel gear .fast speed.

82 to the spider 85. The driving motor 25 is then started and the fast speed clutch 39, 40 is applied, and as a result the truck wheels are driven at a fast speed. It is obvious that upon release of the clutch 87, 89 and application of the clutch 88, 90 the truck maybe driven rearwardly' along the trackway at a When the working face of the coal is reached the fast speed clutch is then released. If an undercut is desired to be made the cutter bar is swung or siued at a fast speed to the right of the entry. The cutter chain sprocket is then connected to the m0- tor and the cutter chain 199 rapidly circulated about the cutter bar. The slow speed clutch 61, 62 is then applied, the bevel gear 83 connected to the spider 85 upon application of the clutch 88, 90 and the machine is then fed forwardly along the trackway at a slow speed andthe bar sumped beneath the coal, the clutch 88, 90 thereafter being released. The cutter bar is then swung to the opposite side of the entry. The operator then applies the clutch 87, 89 and the machine is propelled rearwardly along the trackway at a slow speed and the cutter bar withdrawn from beneath the face. If it is desired to make a shear or vertical cut the operator manipulates the hand wheel 190, thereby applying the'brake band 188 and as a result the spider member '85 is held against rotation. The operator then applies one or the other of the friction clutches 87, 89 and 88, 90 and as a result one or the other of the bevel gears 82, 83 is held against rotation; The slow speed clutch 61, 62' is then applied thereby causing rotation of the bevel gear 80, the latter reacting against'the stationary bevel gear with which it meshes, and as a result, the machine body is bodily rotated within its bearings about its longitudinal axis and the bar swung into a vertical plane. The shearing operation is substantiallythe same as that described above in connection with the undercutting operation. If it is desired to vary the elevation of the bar and the machine body, one or the other of the clutches 87, 89 and 88, 90 is applied, thereby connecting one or the other of the bevel gears to the spider member 85 and upon application of the clutches 124:, 126 and 125, 127 the screws 137, 144 are moved axially within their guides,

thereby swinging the racks 142, 149 together with the arms 19 and 20 and consequently the machine frame is moved upwardly or downwardly to the elevation desired. If it is desired to tilt the bar one or the other of the brake bands 117 and 1.18 is applied, thereby resisting rotation of one or the other of the bevel gears 103, 104 of the differential and consequently speeding up the other bevel gear, and as a result one of the screws is moved axially at a faster speed than the other. This causes one of the racks to be swung at a speed faster than the other, and

as a result the machine is tilted in an obvious manner about a transverse axis. It is obvious that upon suitable application of the brake bands 117, 118 the speed of axial movement of the racks 142, 149 may be varied as desired, the differential automatically in- V versely proportioning the power delivered to derst-ood when reference is made to mechanism for independently adjusting the supports, in the appended claims. 7

While I have in this application specifically described one form which my invention may assume in practice,-it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

' 1. In a mining machine,

a machine body,

characteristic of this invention is to be unr adjustable front and rear supports therefor including support wheels adapted to run along a mine trackway, cutting mechanism carried by said body, body, and mechanism driven by said motor for adjusting said front support independently of said rear support, said cutting mecln anism having a mounting on said body permitting swinging through substantially a semicircle irrespective of the positions of said arms for varying the elevation and angle of said machine body relative to the support wheels.

2. In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supports for said body, and mechanism driven by said motor for adjusting said supports including a differential operatively connected to each support;

3. In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear sup ports for said body, and mechanism driven by said motor for adjusting said supports including a differential operatively connected to each support, said differential being adapted to automatically inversely proportion the power transmitted to said supports by said motor. I

4. In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supa motor carried by said ports for said body, and mechanism driven by said motor for adjusting said supports including a differential operatively connected to each support, said differential being adapt ed to automatically inversely proportion the power transmitted to said support by said motor, and frictional devices controlling difrerent elements of said differential.

In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supports for said body including support Wheels adapted to run along a mine traclawa and mechanism driven by said motor for independently adjusting said supports for varying the elevation and angle of said machine body relative to the support Wheels and including an orbitally movable element and means for effecting rotation of said element in opposite directions.

6. In a mining machine, a frame having adjustable front and rear supports, mechanism for adjusting said supports to vary the elevation of said frame, a machine body rotatably mounted on said frame, cutting mechanism carried by said body, a motor in said body, and mechanism driven by said motor for rotating said body relative to said frame including a rotatable reaction member and means releasable at will for holding said member stationary to effect body rotation.

7. In a mining machine, a frame having adjustable front and rear supports, mechanism for adjusting said supports to vary the elevation of said frame, a machine body rotatably mounted on said frame, cutting mechanism carried by said body, a motor in said body, and mechanism driven by said motor for rotating said body relative to said frame including a rotatable reaction member and means releasable at will for frictionally holding said member stationary to effect body ro tation.

8. In a mining machine, a machine body, cutting mechanism carried thereby and swingable about a pivot adjacent one end of said body, a motor carried by said body, adjustable front and rear supports for said body including support Wheels adapted to run along a mine trackway, and mechanism driven by said motor for independently adjusting said supports for varying the elevation and angle of said machine body relative to the support Wheels.

9. In a mining machine, a frame having adjustable front and rear supports, a machine body rotatably mounted on said frame, cuttin mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for rotating said body and for independently adjusting said supports.

10. In a mining machine, a machine body, cutting mechanism carried thereby and swingable almuta pivot adjacent one end of said body. a motor carried by said body, adjustable front and rear supports for said body including support wheels adapted to run along a mine trackivay, and mechanism driven by said motor for independently or simultaneously adjusting said supports for varying the elevation and angle of said machine body relative to the support Wheels.

11. In a mining machine, a frame having adjustaole front and rear supports, mechanism for adjusting said supports to vary the elevation of said frame, a machine body rotatably mounted on said frame, cutting mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for effecting rotation of said body relative to said frame including a frictionally controlled reaction element and means releasabie at will for frictionally holding said reaction member stationary to effect body rotation.

12, In a mining machine, a frame having adjustable front and rear supports, mechanism for adjusting said supports to vary the elevation of said frame, a machine body rot; ably mounted on said frame, cutting mechanism carried by said body, a motor carried by said body, a plural speed transmission mechanism carried by said body and driven by said motor, and mechanism driven through said transmission mechanism for effecting rotation of said body at different speeds relative to said frame including a frictionally controlled reaction element.

13. In a mining machine, a machine bod adjustable front and rear supports therefor, cutting mechanism carried by said body, a motor carried by said body, fast and slow speed transmission mechanism carried by said body and driven by said motor, and mechanisn'i driven through said transmission mechanism for independently adjusting said supports. 14. In a mining machine, a machine body, cutting mechanism carried thereby, a plurality of adjustabl supports for said body, and mechanism for independently adjusting said supports including a differential gearing operatively connected to each support.

15. In a mining machine, a machine body. cutting mechanism carried thereby and swingable about a pivot adjacent one end of and body, adjustable front and rear supports for said body including su )port wheels adapted to run along a mine trackway, and mechanism for sin'iultaneously or independently adjusting said supports for varying the elevation and angle of said machine body relative to the support Wheels.

16. In a mining machine, a machine body, cutting mechanism carried thereby, adjustable front and rear supports for said body, and mechanism incltuling a differential operatively connected to each support for simultaneously or independently adjusting the same to vary the angle in altitudeand elevation of saidbody.

17. In a mining machine,a machine body,

7 and 7 adjacent one end of adjustable front and rear supports for said body including support wheels along a mine trackway, a moadapted to run tor carried by said body, and mechanism driven by said motor for independently adj usting said supports to vary the angle in altitude of said b0 y relative to said support wheels. V p

18. In a minin'g'machine, a machine body, cutting mechanism carried thereby and swingable about a pivot adjacent one end of said body, adjustable front and rear for said body including support wheels adapted to run along a minetrackway, a motor car ied by said body, mechanism driven by said motor for independently or simultaneously adjusting said supports to vary the angle in altitude and elevation of said bod relative to said support wheels, and mechanism driven by said motor for driving the truck wheels irrespective of the adjusted. position of said supports.

19. In a "mining machine, supporting means, a frame mounted thereon, and means for var in the elevation of said frame on c 2:

said supporting means including a plurality of arcuate toothed members, axiallymovable racks cooperating therewith, and means for simulaneously sliding said racks comprising J a differential having corresponding elements operatively connected thereto.

20. In a mining machine, supporting means, a frame mounted thereon, and means for varying the elevation of said frame on said supporting means including a plurality of arcuate toothed members, axially movable raciis cooperating therewith, and means for:

independently or simultaneously sliding said racks comprising a difierential having corresponding elements operatively connected thereto;

21. In a mining machine, a wheeled support, a machine body rotatably mounted thereon about its longitudinal axis, a motor carried by said body, mechanism driven by said motor for changing the elevation of said machine body relative to the wheels of said support, and means driven by said motor for effecting rotation of said body including a driving element arranged coanially with said motor axis, a cooperating element connected to said driving element and on which the latter is adapted to react, and means for holding said cooperatin element stationary durbody rotation or for releasing it at will, 22. In a mining machine, a wheeled support including pivoted arms, a body on said support, a motor carried by said body, and

me as for swinging said arms to vary the liation of said body includingreciprocable supports port.

ciprocable shafts and means for independently recigroca'ting said shafts including a difi' rential operatively connected to bothof the same'an having corresponding elementsconnected to each shaft.

- 24. in a mining machine, a machine body, cutting mechanism carried thereby, a motor in body, adjustable front and rear supportsfor said body, and mechanism driven by said motor for independently adjusting said supports including an orbitally movable element, through which power is transmitted to effect adjustment of both supports.

in a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supports'for said body, and mechanism driven by said motor for independently adjusting said supports including an orbitally movable element through Whichpower is transmitted to effect adjustment of both supports, and means for effecting rotation of said element in opposite dir ctions to effect adjustment of said supports in opposite directions.

26. in a mining adjusta le front and rear supports,-a-machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, cutting'mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for adjusting said front support independently of said rear sup- 27. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, cutting mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for independently adjusting said supports. i

28. In mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, cutting mechanism carried by said body, a motor carried by said body, andmechanism driven by said motor for independently oil-simultaneously adjusting said supports.

29. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, 'cuttii'ig mechanism carried by said body, and mechanism for simultaneously or machine, a frame having independently adjusting said supports to vary the elevation and angle in altitude of said body.

30. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, cutting mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for independently adjusting said supports to vary the angle in altitude of said body.

81. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, cutting mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for independently or simultaneously adjusting said supports to vary the angle in altitude and elevation of said body.

32. In a. mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, mechanism driven by said motor for effecting rotation of said body relative to said frame, cutting mechanism carried by said body, a motor cai-ied by said body, and mechanism driven by said motor for adjusting said front support independently of said rear support.

33. In amining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, mechanism driven by said motor for effecting rotation of said body relative to said frame, cutting mechanism carried by said body, a motor carried by said body, and mechanism driven by said motor for independently adjusting said supports.

34. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, mechanism driven by said motor for effecting rotation of said body relative to said frame, cutting mechanism carried by said body, a mot-or carried by said body, and mechanism driven by said motor for independently or simultaneously adjusting said supports.

35. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, mechanism driven by said motor for effecting rotation of said body relative to said frame, cutting mechanism carried by said body, and mechanism for simultaneously or independently adjusting said supports to vary the elevation and angle of said body.

36. .In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, mechanism driven by said motor for effecting rotation of said body relative to said frame, cutting mechanism carried by said body, aamotor carried by said body, and mechanism driven by said motor for independently adjusting said supports to vary the angle in altitude of said body.

3. In a mining machine, a frame having adjustable front and rear supports, a machine body mounted on said frame for rotation about an axis extending longitudinally of the machine, mechanism driven by said motor for effecting rotation of said body relative to said frame, cutting mechanism carried by said bot y, a motor carried by said body, and mechanism driven by said motor for independently or simultaneously adjusting said supports to vary the angle in altitude and elevation of said body.

88. In a mining machine, a machine body, supportingmeans for said body comprising front and rear pivoted wheel carrying supporting arms, cutting mechanism carried by said body and swingable through an arc of substantially 180 irrespective of the positions of said arms, a motor carried by said body, and mechanism driven by said motor for adjusting said front pivoted arm independently of said rear pivoted arm.

39. In a mining machine, a machine body, cutting mechanism carried thereby, a motor carried by said body, supporting means for said body. comprising pivoted front and rear Wheel carrying supporting arms, and mechanism driven by said motor for independently adjusting said arms about their pivots, said cutting mechanism having a mounting on said body permitting swinging through substantially a semicircle irrespective of the positions of said arms.

4-0. In a mining machine, a machine body, cutting mechanism carried thereby, a motor carried by said body, supporting means for said body comprising pivoted front and rear wheel carrying supporting arms, and mechanism driven by said motor for independently or simultaneously adjusting said arms about their pivots, said cutting mechanism having a mounting on said body permitting swinging through substantially a semicircle irrespective of the positions of said arms.

41. In a mining machine, a machine body, cutting mechanism carried thereby, supporting means for said body comprising pivoted front and rear wheel. carrying supporting arms, and mechanism interconnecting said arms for simultaneously or independently adjusting said arms about their pivots, said cutting mechanism having a mounting on said body permitting swinging through subill stantially a semicircle irrespective of the positions of said arms.

42. In a mining machine, a machine body, cutting mechanism carried thereby, supporting means for said body comprising pivoted front and rear Wheel carrying supporting arms, a motor carried by said body, and mechanism driven by said motor for independently adjusting said arms about their pivots to vary the angle in altitude of said body, said cutting mechanism having a mounting on said body permitting swinging through substantially a semicircle irrespective of the positions of said arms,

$3. In ainining machine, a machine body,

cutting mechanism carried thereby, support ing meansfor said body comprising pivoted front and rear Wheel carrying supporting arms, a motor carried by body, and mechanism driven by said motor for independently or simultaneously adjusting said arms about their pivots to vary the angle in altitude and elevation of said body, said cutting mecha nism having a mounting on said body permitting swinging through substantially a semicircle irrespective of the positions of said arms. 7

In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supports for said body, and mechanism driven by said motor for adjusting said supports including a differential having corresponding elements operatively connected to said supports and through which power transmitted to said supports is automatically equally proportioned.

45. In a mining machine, a machine body, cutting mechanism carried thereby, motor in said body, adjustable front and rear supports for said body, and'mechanism driven by said motor for adjusting said supports including a differential having corresponding elements operatively connected to said supports and through which power transmitted to said supports is automatically equally proportioned, and means for resisting movement of the adjusting means for one support to effect a corresponding increase in the rate of adjustment of the other support.

46. In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear sup ports for said body, and mechanism driven by said motor for adjusting said supports including a differential having corresponding elements operatively connected to said supports and through which power transmitted to said supports is automatically inversely proportioned. r I

47. In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supports for said body, and mechanism driven by said motor, for adjusting said supports inmechanism for eluding a differential having corresponding elements operatively connected to said supports and through which power transmitted to said supports is automatically inversely proportioned, and frictional devices controlling diflerent elements of said differential.

48. In a mining machine, a machine body, cutting mechanism carried thereby, and mounted for swinging movement on an axis adjacent one end of said body, a motor carriedby said body, adjustable front and rear supports for said body each including support Wheels adapted to run along a mine trackway, and mechanism driven by said motor for independently adjusting said supports to elfectmovement of said support Wheels relative to eachothcr to vary the'angle in altitude of said cutter carrying body.

d9. In a mining machine, a machine'body, cutting mechanism carried thereby and mounted for swinging movement on an axis adjacent one end of said body, a'motor carriedby said body, adjustable front and rear supports for said body each including sup: port wheels'adapted to run along a mine trackway, and mechanism driven by said motor for independently or. simultaneusly adjusting said supports to efiect movement of said support wheels relative to eachother to vary the elevation and angle in altitude of said cutter carrying body.

50.- In a mining machine, a machine body, cutting mechanism carried thereby, and mounted for swinging movement on an axis adjacent one end of said body, adjustable front and rear supports for said bodyeach including support wheels adapted to run along a mine trackway, and mechanism for simultaneously or independently adjusting said supports to effect movement of said support wheels relative to each other to vary the elevation and angle in altitude of said cutter carrying body.

51. In a mining machine, kerf cutting mechanism, mounted for positioning to cut in substantially horizontal or in substantially vertical planes and adjustable supporting means for said cutting mechanism including adjustable front and rear supports, and

adjusting said supports including a power operated element and adj usting devices for each support including a clutch for connecting said adjusting devices to said power operated element.

52. In a mining machine, kerf cutting mechanism, and adjustable supporting means for said cutting mechanism including adjustable front and rear supports, said cutting mechanism being swingable about an axis in advance of said front support and power operated mechanism for adjusting said supports including adjusting connections arranged at opposite sides and extending longitudinally of the machine.

53. In a mining machine, kerf cutting mechanism, and adjustable supporting means for said cutting mechanism including adjustable front and rear supports, said cutting mechanism being sWingable about an axis in advance of said front support and mechanism for independently adjusting said supports including a power operated element and speed varying mechanism driven thereby.

54:. In a mining machine, kerf cutting mechanism, adjustable supporting means for said cutting mechanism including adjustable front and rear supports, said cutting mechanism being swingable about an axis in ad vance of said front support mechanism for independently adjusting said supports including a power operated element and speed varying mechanism driven thereby, and propelling means for the machine driven through said speed varying mechanism.

55. In a mining machine, kerf cutting mechanism, adjustable supporting means for said cutting mechanism including adjustable front and rear wheeled supports, said kerf cutting mechanism being swingable about an axis in advance of said front support, motor operated devices for independently adjusting said supports including a differential, and mechanism driven through said differential for driving the support Wheels to propel the machine.

56. In a mining machine, a machine body, cutting mechanism carried thereby, a motor in said body, adjustable front and rear supports for said body, said kerf cutting mechanism being swingable about an axis in ad Vance of said front support, mechanism driven by said motor for independently adjusting said supports including an orbitally movable element through Which power is transmitted to effect ftCljUSJlTlGIlt of both supports, and mechanism driven through said orbitally movable element for propelling the machine.

In testimony whereof I afiix my signature.

CORNELIUS G. BOUDETTE. 

